After playing the map a couple of times, I've come to the opinion that it might be better if the Science building's bonus was lowered to 3.

The Science building has less rooms than the Liberal Arts building while having the same amount of entrances. More so however is the fact that all three entrances of Science have direct connections so defending troops from another entrance can be used to retake a lost room the very next turn (unlike the liberal arts building which has some separation on the third entrance and thus relying more on deployed troops or delays to fortify some over).